News Details
Flexible paint crosslinking agent
2017-5-28 23:53:26
Flexible paint crosslinking agent
The preparation of elastic coating. Scattered on the cylinder to join the deionized water, in turn, add dispersant, wetting agent, defoamer, pH regulator, stir well, and slowly add fillers, high speed dispersed fillers slurry fineness is made to reach 60 mu m below. At low speed mixing, the elastic emulsion is added to the paste, and it is added as a membrane auxiliary, thickening agent, pH regulator and anti-foam mixture.
The reaction mechanism of the self-crosslinking monomer (daam-adh). Diacetone acrylamide (DAAM) is a kind of vinyl monomer containing ketone carbonyl, easily with other vinyl monomer copolymerization, get the acrylic emulsion containing ketone carbonyl. After the addition of crosslinking agent diacylhydrazine (ADH), the self-crosslinking emulsion can be made into a single component.
In the emulsion, although there is a ketocarbonyl and acylhydrin, and the ketone carbonyl and the acylhydrazine react to form the hydrazone and the water, the reaction is a reversible reaction. In particular, when there is a lot of water in the emulsion, the addition of that reaction is actually not going to happen. Emulsion or coating, in the process of dry film due to evaporation of neutralizing agent, such as water and ammonia system acidic environment, ketone carbonyl and hydrazide addition reaction of hydrazone and water, dry film, form a three-dimensional network structure.
The effect of added monomer on the performance of the emulsion. Under the reaction conditions, crosslinking monomer (DAAM) added according to the amount of total monomer 0, 1.0%, 1.5%, 2.0%, 1.5%, emulsion glass transition temperature 25 ℃ respectively, design emulsion gel rate, detection of water absorption and DQ.
As the amount of DAAM in the emulsion increased, the absorbate rate of the coating decreased correspondingly. But when you increase DAAM too much, the water absorption rate increases. DAAM content is 0, bibulous rate is 10.3%, DAAM content is 1.5% and 2.0%, bibulous rate is decreased to 4.2% and 4.2%, when DAAM content is 2.5%, bibulous rate is 6.7%. The reason is related to DAAM hydrophilic.
Chinese name: Diethyl toluene diamine(DETDA)
Chinese alias: aryl, aryl diethyl - aryl - methyl-p-phenylenediamine
English name: Benzenediamine, ar, ar-diethyl-ar-methyl-English aliases:Diethyltoluenediamine; ar, ar-Diethyl-ar-methylbenzenediamine;Diethylmethylbenzenediamine;
CAS No. :68479-98-1
EINECS No. :270 -877-4
Molecular formula: C11H18N2
Molecular Weight: 178.28
Boiling point: 310 ℃
Refractive index: 1.581
Flash Point: > 140 ℃
Inchi: InChI = 1/C11H18N2/c1-4-8-6-7 (3) 10 (12) 11 (13) 9 (8) 5-2/h6H ,4-5,12-13H2 ,1-3H3 density : 1.022
Risk Codes: R10; R35
RIDADR: UN 3082
Safety instructions: S2; S26; S39; S61
Packing Group: III
Hazard Class: 6.1
With the increase of DAAM, the emulsion gel ratio improved, and the emulsion gel rate reached 0.55% when the DAAM added 2.5 percent. The reason may be that the increase in the probability of water phase nucleation is increased by the amount of added water in the hydrophilic monomer DAAM, which increases the gel rate and reduces the stability of the emulsion polymerization.
Emulsion particle size increases as the amount of DAAM plus, also showed a trend of increase, estimates and DAAM increment after polymerization process water each other nuclear aggregation probability increase, reduce the probability of micellar nucleation. At the same time, the amount of emulsion pellets is reduced and the size of the emulsion is increased.
The effect of added monomer on the performance of elastic coatings. Design of glass transition temperature respectively to 25 ℃, 35 ℃ - synthetic latex, according to the corresponding elastic coating PVC = 30%, and the detection performance of elastic coating.
With crosslinking monomer, with the increase of adding amount of elongation of coating at room temperature and low temperature elongation decreases gradually, while the tensile strength of the coating increased gradually, the fouling resistance increase gradually. Reason is associated with the crosslinking degree of the emulsion, in duplicate volume increase, junction increases in the coating, coating to enhance rigidity, tensile stress increases, strain is reduced, the crosslinking density increases at the same time, make the film more dense, contamination resistance are also improved.
By the test results, amount of crosslinking monomer adding 1.5% ~ 2.0% of total monomers, the coating has good comprehensive performance, the fouling resistance of the coating and mechanical properties to achieve a better balance.
Reactive emulsifiers in emulsion synthesis, directly involved in the reaction as a part of the polymer and anionic emulsifier through electrostatic repulsion emulsion stability and the distribution of use, the emulsion performance is best, adding amount of 1.5% ~ 2.0% of monomer amount, reactive emulsifier and anionic emulsifier prepared by the 2:1. The initiator took the sulfate initiator and added 0.5% ~ 1.0% of the monomer.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
The preparation of elastic coating. Scattered on the cylinder to join the deionized water, in turn, add dispersant, wetting agent, defoamer, pH regulator, stir well, and slowly add fillers, high speed dispersed fillers slurry fineness is made to reach 60 mu m below. At low speed mixing, the elastic emulsion is added to the paste, and it is added as a membrane auxiliary, thickening agent, pH regulator and anti-foam mixture.
The reaction mechanism of the self-crosslinking monomer (daam-adh). Diacetone acrylamide (DAAM) is a kind of vinyl monomer containing ketone carbonyl, easily with other vinyl monomer copolymerization, get the acrylic emulsion containing ketone carbonyl. After the addition of crosslinking agent diacylhydrazine (ADH), the self-crosslinking emulsion can be made into a single component.
In the emulsion, although there is a ketocarbonyl and acylhydrin, and the ketone carbonyl and the acylhydrazine react to form the hydrazone and the water, the reaction is a reversible reaction. In particular, when there is a lot of water in the emulsion, the addition of that reaction is actually not going to happen. Emulsion or coating, in the process of dry film due to evaporation of neutralizing agent, such as water and ammonia system acidic environment, ketone carbonyl and hydrazide addition reaction of hydrazone and water, dry film, form a three-dimensional network structure.
The effect of added monomer on the performance of the emulsion. Under the reaction conditions, crosslinking monomer (DAAM) added according to the amount of total monomer 0, 1.0%, 1.5%, 2.0%, 1.5%, emulsion glass transition temperature 25 ℃ respectively, design emulsion gel rate, detection of water absorption and DQ.
As the amount of DAAM in the emulsion increased, the absorbate rate of the coating decreased correspondingly. But when you increase DAAM too much, the water absorption rate increases. DAAM content is 0, bibulous rate is 10.3%, DAAM content is 1.5% and 2.0%, bibulous rate is decreased to 4.2% and 4.2%, when DAAM content is 2.5%, bibulous rate is 6.7%. The reason is related to DAAM hydrophilic.
Chinese name: Diethyl toluene diamine(DETDA)
Chinese alias: aryl, aryl diethyl - aryl - methyl-p-phenylenediamine
English name: Benzenediamine, ar, ar-diethyl-ar-methyl-English aliases:Diethyltoluenediamine; ar, ar-Diethyl-ar-methylbenzenediamine;Diethylmethylbenzenediamine;
CAS No. :68479-98-1
EINECS No. :270 -877-4
Molecular formula: C11H18N2
Molecular Weight: 178.28
Boiling point: 310 ℃
Refractive index: 1.581
Flash Point: > 140 ℃
Inchi: InChI = 1/C11H18N2/c1-4-8-6-7 (3) 10 (12) 11 (13) 9 (8) 5-2/h6H ,4-5,12-13H2 ,1-3H3 density : 1.022
Risk Codes: R10; R35
RIDADR: UN 3082
Safety instructions: S2; S26; S39; S61
Packing Group: III
Hazard Class: 6.1
With the increase of DAAM, the emulsion gel ratio improved, and the emulsion gel rate reached 0.55% when the DAAM added 2.5 percent. The reason may be that the increase in the probability of water phase nucleation is increased by the amount of added water in the hydrophilic monomer DAAM, which increases the gel rate and reduces the stability of the emulsion polymerization.
Emulsion particle size increases as the amount of DAAM plus, also showed a trend of increase, estimates and DAAM increment after polymerization process water each other nuclear aggregation probability increase, reduce the probability of micellar nucleation. At the same time, the amount of emulsion pellets is reduced and the size of the emulsion is increased.
The effect of added monomer on the performance of elastic coatings. Design of glass transition temperature respectively to 25 ℃, 35 ℃ - synthetic latex, according to the corresponding elastic coating PVC = 30%, and the detection performance of elastic coating.
With crosslinking monomer, with the increase of adding amount of elongation of coating at room temperature and low temperature elongation decreases gradually, while the tensile strength of the coating increased gradually, the fouling resistance increase gradually. Reason is associated with the crosslinking degree of the emulsion, in duplicate volume increase, junction increases in the coating, coating to enhance rigidity, tensile stress increases, strain is reduced, the crosslinking density increases at the same time, make the film more dense, contamination resistance are also improved.
By the test results, amount of crosslinking monomer adding 1.5% ~ 2.0% of total monomers, the coating has good comprehensive performance, the fouling resistance of the coating and mechanical properties to achieve a better balance.
Reactive emulsifiers in emulsion synthesis, directly involved in the reaction as a part of the polymer and anionic emulsifier through electrostatic repulsion emulsion stability and the distribution of use, the emulsion performance is best, adding amount of 1.5% ~ 2.0% of monomer amount, reactive emulsifier and anionic emulsifier prepared by the 2:1. The initiator took the sulfate initiator and added 0.5% ~ 1.0% of the monomer.
Copyright: Zhang Jia Gang YaRui Chemical co.,Ltd
Diethyl toluene diamine(DETDA) http://www.yaruichem.com
Spanish
French
Italian
Portuguese
Japanese
Korean
Arabic
Russian